EverSet® technologies links
NIST WWVB website:
www.nist.gov/pml/div688/grp40/wwvb.cfm
Enhanced WWVB Broadcast Format:
http://www.nist.gov/pml/div688/grp40/upload/NIST-Enhanced-WWVB-Broadcast-Format-1_01-2013-11-06.pdf
HKW Test equipment provides a signal generator supporting the enhanced protocol:
www.hkw-elektronik.de/englisch/index.php